Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52fed3687ee5e50…

MALICIOUS

PDF

73.7 KB Created: 2021-03-06 13:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d86c2924682e81df21a22cdb9cc62204 SHA-1: 6026451db1d935d9ed2f6f9f6110358e85c5a73e SHA-256: b52fed3687ee5e504c72a52ff270af69e81aa1226bf099901a30223722e3f9f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The primary URL suggests a lure related to a game hack, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/wix?keyword=final+fantasy+brave+exvius+hack+ios PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4530457/normal_5ff82abca5ce9.pdfIn PDF document text
    • http://d2-club.ru/which_bible_is_most_accurate824ds.pdfIn PDF document text
    • http://freefire-gifts.com/junji_ito_uzumaki_bookt2bde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476445/normal_5fcbf2e4ee9ef.pdfIn PDF document text
    • http://boevoenlp.com/file_from_github_using_ansiblebiiyf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_6031f5d0dbdb5.pdfIn PDF document text
    • http://chambrehq.xyz/129926546374fh0p.pdfIn PDF document text
    • http://webmastervlad.ru/rabeviwiwiv9453.pdfIn PDF document text
    • https://pewewikivu.weebly.com/uploads/1/3/5/3/135302390/0e4fd8f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_600b8cd589d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_600f51b142797.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/leturadalexagu-lopawemot.pdfIn PDF document text
    • http://klosheff.xyz/adobe_premiere_pro_2020_crack_v14.6.0.51_free_download_latestprndf.pdfIn PDF document text
    • http://lidzadva.xyz/gleeds_financial_reportbs47f.pdfIn PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/4640681.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/coda_12_steps_workbookfhavi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/payroll_system_excel_format.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/st_nicholas_chantry_school_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38cc7373-bb9d-45e2-a65e-3f6f2618d986/6431023369.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/67195254418.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/stranger_chat_anonymous_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d08fe92-7a7d-4db3-9422-e06d1843f17b/brinkmann_smoker_electric_element.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 5360 bytes
SHA-256: 25e77d7365167a654e495fac895e6296f5ca4d395625f00050a54136a0e284b0
font_01_sfnt_off0000f466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF466 11588 bytes
SHA-256: e1acb498ad5492dd80de76f2c9214856b20e3a0210517fd676325dcaddb92b4c

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